/Engine/Plugins/Runtime/AudioSynesthesia/Source/AudioSynesthesiaCore/Public/InterpolateSorted.h
OutLowerIndex is populated with the index of the last element in InArray with a Timestamp less than or equal to InTimestamp. On error, this is set to INDEX_NONE OutUpperIndex is populated with the index of the first element in InArray with a Timestamp greater than InTimestamp. On error, this is set to INDEX_NONE OutAlpha is a number between 0.f and 1.f which describes the blending between the lower and upper indices. 0.f refers OutLowerIndex and 1.f to OutUpperIndex.
namespace Audio { template<typename ElementType> void Audio::GetInterpolationParametersAtTimestamp ( [TArrayView](API\Runtime\Core\Containers\TArrayView)< const ElementType > InArray, float InTimestamp, int32 & OutLowerIndex, int32 & OutUpperIndex, float & OutAlpha ) }